Grease-gun coupling head



Now 215,'h930. l s. J. KRANNAK L A 1,782,691 A' GREASE GUN coUPLING HEAD I Filed Aug. 3,' 1.929n

Patented Nov. 25, 1930 UNITED AsTaTiis PATENT "ori-ICE N GREASE-GUN COUPLING HEAD Application led August 3, 1929. Serial No. 383,262.

My present invention relates to lubricator. the gasket 13. The numeral 15 indicates a. coupler systems, such as are used in lubricatcoiled spring that is telescoped over the inner ing various parts of automobiles and the like, end of the grease delivery tube l and over and provides an extremely simpleand highly the hub of the Washer 14 and reacts against efficient coupling head or device for connectsaid Washer and against, the collar l1 of the 55 ing the greaseedelivery pipe t0 the Various tube 10. i This 4Spring eXeltS a fOI'Ce that 1101*- receiving nipples on the automobile or other mally holds the collar 11 tightly pressed machine to be lubricated. against the inner end of the sleeve 8 and the Generally stated, the invention consists of nozzle 5 pressed against the stop ledge 12. At

10 the novel devices, combinations of devices ltS enter face, the nozzle 5 is formed with a 60 and arrangement ef parte hereinafter deconical seating surface 16 that is adapted to scribed and defined in the Claim, be forced into the grease-receiving port a of Referring t0 the drawings, wherein like a receiving nipple b that is provided with a characters indicate like par'ts throughout the IlOIllly Sprlng-Seated inwardly Opening 5 several Views; check valve c of the ball type. The plunger 65 Fig. 1 is a view chiefly in axial section, but 5 1S PIOVded With en aXed grease delivery with some parts shown in full and some parts PaSage 17 that eXtendS aXlally thrOngh the breken away, Showing the improved Coupling conical seating surface 16 and is aligned with head applied to a grease-receiving nipple; @X131 Perfea'tlons 18 and 19 formed, 11eSPee 20 Fig 2 is a plan View of the coupling head, tively, 1n the gasket 15 and washer 14. The -70 Some parte being broken away; and outer contracted portion of the bore of the Fig. 3 is an enlarged fragmentary section CeSmg 4 1S adapted .te be freely teleSeOPed taken on the line 3 .3 0f Fig, 1 over the receiving nipple and said casing The coupling head or device propelcom- 1s formed at its outer portion with L-shaped prises three main elements, to wit: a. cylinbayonet nftches 20 thetele, arranged t0 111' '-75 drical casing 4, a plunger-acting nozzle 5, and tel'leck 11th Pms 01 ProleedlonsfZ 0n the Te' a coupling sleeve 6. The sleeve 6 is internaleelvlng nlpple b- The/grease dehve'y tube 10 ly and externally threaded and is Screwed 1s shown as sciewed into the tubiilar sleeve into the internally threaded end of the cy- 21 at'the dellvey end Of e gljeaseplpe 22- lindrical casing 4 with its head 7 tightly BY efe'enee t0 F15 1a 1t Wlu be notedo jammed against the adjacent end 0f Said ease that the 106351011 0f the bayOnet IlOtCheS OI- 111g, A secondary coupling Sleeve 8 is Screw- SlOtS Q0 t0 the StOp ledge 12 iS Such that, When threaded into the sleeve 6 with its head 9 the head 1s coupled to the nipple, the conical tightly jammed against the head 7. A grease seating surface 16 will be forced into the redelivery tube 10 is extended through and ceiving port a of .the nipple b to force the S5 swiveled in the sleeve 8 and, short of its inner ball valve c into an open position, and the end, is provided with a collar or outstanding nozzle V5 will be forced inward against the annular flange 11 that is tightly pressed tension of the spring 15, so that it stands against the inner end of said sleeve 8. away from the stop ledge 12. Of course, the

' The plunger-acting nozzle 5 has a slight spring 15 will be much stronger than the 90 piston-like movement within the cylindrical spring o that presses the valve 0 toward its casing 4, its outward movement being limited closed position. Moreover, the spring 15 will by an internal stop ledge 12 formed by a. conbe of sufficient tension to form a grease-tight traction of the outer portion of the bore of joint between the 'seating surface 16 and port said casing. Working against the inner face a and to maintain such grease-.tight joint* 95 of thenozzle 5 is a slightly pliable gasket 13, against the high internal pressure under of material such as leather, that closely lits which the grease will be delivered to the nipand forms a grease-tight joint against the cyple. With this construction, it is evident that lindrical bore of the casing 4. The numeral the valve c of the nipple b will be unseated by 14 indicates a metallic Washer placed against the very act of applying the coupling head 0C to the nipple and in advance of and independently of the delivery of grease. Of course, the pressure of the grease will force the ball valve further inward and out of engagement with the apex of the conical edge of the seating surface 16, so that the grease will be freely delivered into the nipple.

i The device described, while of simple construction, strong and durable, has in practice been found highly eicient and satisfactory for the purposes had in view.

What I claim 1s:

A coupling head for ease delivery systems comprising a cylin rical casing having means for interlocking engagement with a receivin nipple equipped with outstanding lugs, a p unger-actin nozzle working in said casing .and rovide with a substantially conical axia ly perforated seating surface adapted to enter the receiving port of the y grease-receiving nipple, a centrally perforated pliable gasket seated against the inner face of said nozzle and forming a tight joint with the bore of said casing, a sleeve structure applied in the receiving end of said casing, a grease delivery tube swiveled in said sleeve structure and having an annular shoulder formin applie to t e inner end of said grease delivery tube and reacting against and pressin said nozzle yieldn y outward.

n testimony whereo I aiix my signature.

STEVEN J. KRANNAK.

a tight joint therewith, and a spring 

